| NSNorth Star Propellers INC | San Diego | CA | — | ◇ UNVERIFIED |
| NSNorth Star Safe LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| NSNorthstar Steel Fab. INC | Rhinelander | WI | — | ◇ UNVERIFIED |
| NTNorth Texas Steel | Fort Worth | TX | — | ◇ UNVERIFIED |
| NANorthwest Aluminum Trailers INC | Roseburg | OR | — | ◇ UNVERIFIED |
| NFNorthwest Fl Machine | Pensacola | FL | — | ◇ UNVERIFIED |
| NGNorthwest Graphic Works LLC | Hood River | OR | — | ◇ UNVERIFIED |
| NWNorth West Hardwoods, INC. | Tuscumbia | AL | — | ◇ UNVERIFIED |
| NINorthwest Industries, INC. | Russellville | AL | — | ◇ UNVERIFIED |
| NMNorthwest Machine INC. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| NMNorthwest Machine Works INC | Grand Junction | CO | — | ◇ UNVERIFIED |
| NMNorthwest Metals Fabrication | Arlington | WA | — | ◇ UNVERIFIED |
| NMNorthwest Millwork INC | Salem | OR | — | ◇ UNVERIFIED |
| NPNorthwest Precision Fabricators INC | Oregon City | OR | — | ◇ UNVERIFIED |
| NSNorthwest Structural Services INC | Portland | OR | — | ◇ UNVERIFIED |
| NSNorthwest Structural Services INC | Portland | OR | — | ◇ UNVERIFIED |
| NSNorthwest Structural Services INC | Portland | OR | — | ◇ UNVERIFIED |
| NTNorthwest Thermal Systems INC | Estacada | OR | — | ◇ UNVERIFIED |
| NWNorthwest Wood Reflections INC | Eugene | OR | — | ◇ UNVERIFIED |
| NMNorthwoods Machine INC | Elk River | MN | — | ◇ UNVERIFIED |
| NNNortrax New Building | Miami | FL | — | ◇ UNVERIFIED |
| NMNorwest Manufacturing Equipment LLC | Rupert | ID | — | ◇ UNVERIFIED |
| NCNorwood Company INC. | Delphos | KS | — | ◇ UNVERIFIED |
| NANose and Mustache LLC | Markle | IN | — | ◇ UNVERIFIED |
| NGNova Grinding Co, Inc | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| NSNova Services INC. | Toledo | OH | — | ◇ UNVERIFIED |
| NTNova Tool CO | Hayward | CA | — | ◇ UNVERIFIED |
| NPNovel Precision Machine LLC | Lyndon | KY | — | ◇ UNVERIFIED |
| NMNovelty Machine Works | Jackson | MS | — | ◇ UNVERIFIED |
| NFNowlin Fence INC | Anaheim | CA | — | ◇ UNVERIFIED |
| NSNowlin Steelcraft, INC. | Hampton | VA | — | ◇ UNVERIFIED |
| NMNp Manufacturing Group LLC | New Paris | OH | — | ◇ UNVERIFIED |
| NMNpn Machine Tools | Houston | TX | — | ◇ UNVERIFIED |
| NINrlj, INC. | Browns Summit | NC | — | ◇ UNVERIFIED |
| NBNSG Browns, LLC | Topeka | KS | — | ◇ UNVERIFIED |
| NLNsjs LLC | Dallas | TX | — | ◇ UNVERIFIED |
| NCNsk Corporation | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| NSN & S Tractor CO INC | Dos Palos | CA | — | ◇ UNVERIFIED |
| NLNucfil, LLC | Golden | CO | — | ◇ UNVERIFIED |
| NPNuclear Printing LLC | Euclid | OH | — | ◇ UNVERIFIED |
| NNucor | Norfolk | NE | — | ◇ UNVERIFIED |
| NGNucor Grating - Fisher & Ludlow INC. | Madison | MS | — | ◇ UNVERIFIED |
| NHNucor Harris Rebar Jackson LLC | Flowood | MS | — | ◇ UNVERIFIED |
| NRNucor Rebar Fabrication Fontana | Fontana | CA | — | ◇ UNVERIFIED |
| NRNucor Rebar Fabrication Southwest INC | Lakeside | CA | — | ◇ UNVERIFIED |
| NRNucor Rebar Fabrication Southwest INC | Lathrop | CA | — | ◇ UNVERIFIED |
| NSNucor Skyline | Armorel | AR | — | ◇ UNVERIFIED |
| NTNucor Towers and Structures | New Ross | IN | — | ◇ UNVERIFIED |
| NTNucor Towers & Structures | Crawfordsville | IN | — | ◇ UNVERIFIED |
| NVNucor Vulcraft Group | San Antonio | TX | — | ◇ UNVERIFIED |
| NVNucor Vulcraft - St. Joe Division | Saint Joe | IN | — | ◇ UNVERIFIED |
| NNucraft | Roscommon | MI | — | ◇ UNVERIFIED |
| NDNu Design INC | Pine City | MN | — | ◇ UNVERIFIED |
| NSNuEra Steel LLC | Viborg | SD | — | ◇ UNVERIFIED |
| NCNueva Castilla Iron Works, INC. | San Francisco | CA | — | ◇ UNVERIFIED |
| NRNufab Rebar-slidell, LLC | Alexandria | LA | — | ◇ UNVERIFIED |
| NFNumatic Finishing Corporation | Auburn | WA | — | ◇ UNVERIFIED |
| NNNumber Nine, L.l.c. | Lk Havasu Cty | AZ | — | ◇ UNVERIFIED |
| NINumek, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| NCNumerical Control Support, INC. | Shawnee Mission | KS | — | ◇ UNVERIFIED |
| NMNumo Manufacturing, INC. | Kaufman | TX | — | ◇ UNVERIFIED |
| NCNupla Corporation | Sun Valley | CA | — | ◇ UNVERIFIED |
| NFNusteel Fabricators, INC. | Childersburg | AL | — | ◇ UNVERIFIED |
| NMNu-tech Machining INC | Fairview | OR | — | ◇ UNVERIFIED |
| NTNutec Tooling Sys | Meadville | PA | — | ◇ UNVERIFIED |
| NINutra-Boss Inc | Blue Earth | MN | — | ◇ UNVERIFIED |
| NSNWA Steel Co LLC | Siloam Springs | AR | — | ◇ UNVERIFIED |
| NFNW Fluid Power & Controls Co. LLC | Auburn | WA | — | ◇ UNVERIFIED |
| NINw Iron Works INC | Portland | OR | — | ◇ UNVERIFIED |
| NMNw Mixer Feeders | Caldwell | ID | — | ◇ UNVERIFIED |
| NLNwm LLC | Sussex | WI | — | ◇ UNVERIFIED |
| NWN Wood Systems LLC | West Jordan | UT | — | ◇ UNVERIFIED |
| NMNymar Manufacturing Co., INC. | Randolph | NJ | — | ◇ UNVERIFIED |
| N1Nysdec 1731 West Farms Road LLC - Bcp #c203134a | Bronx | NY | — | ◇ UNVERIFIED |
| OBO.a. Both CORP Dba Schlenk Metalic Pigments (stormwater) | Lawrence | KS | — | ◇ UNVERIFIED |
| OAOakcroft Associates, INC. | Monterey Park | CA | — | ◇ UNVERIFIED |
| OHOak-dale Hardwood Products, INC | Spring Valley | WI | — | ◇ UNVERIFIED |
| OIOakdale Iron Works, INC. | Oakdale | PA | — | ◇ UNVERIFIED |
| OPOakdale Precision INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| OEOakfield Enterprises INC | Oakfield | WI | — | ◇ UNVERIFIED |
| OMOakley Metal Stamping INC. | White Plains | NY | — | ◇ UNVERIFIED |
| OFOakridge Fabrication INC | Minnesota City | MN | — | ◇ UNVERIFIED |
| OSOak Street Tank & Steel INC | Ashland | OR | — | ◇ UNVERIFIED |
| OAOakwalk Apartments | Emeryville | CA | — | ◇ UNVERIFIED |
| OOOakwood Operating Company | Mountain Top | PA | — | ◇ UNVERIFIED |
| OLObi Linings INC | Chocowinity | NC | — | ◇ UNVERIFIED |
| OMO'Brien Metal Inc. | Chicago | IL | — | ◇ UNVERIFIED |
| OOO'brien Oilfield Services, LLC | Belfield | ND | — | ◇ UNVERIFIED |
| OOObrien Ornamental Iron INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| OObservaMé® | Tampa | FL | — | ◇ UNVERIFIED |
 Occupational Development Center INC Dba Custom Pro | Bemidji | MN | — | ◇ UNVERIFIED |
| OEOceanside Engineering Mfg | Oceanside | CA | — | ◇ UNVERIFIED |
| OSOcean Steel Corporation | Binghamton | NY | — | ◇ UNVERIFIED |
| OMOchoa Manufacturing CO INC | Turlock | CA | — | ◇ UNVERIFIED |
| OIOc Inds | Twinsburg | OH | — | ◇ UNVERIFIED |
| OIOdom Industries, INC | Milford | OH | — | ◇ UNVERIFIED |
| OSOdonnell Solutions LLC | Riverside | CA | — | ◇ UNVERIFIED |
| OIOdyssey Industrial Systems, LLC | Houston | TX | — | ◇ UNVERIFIED |
| OMOdyssey Machine Company, LTD. | Bowling Green | OH | — | ◇ UNVERIFIED |
| OEOec Engineering Corporation | Chantilly | VA | — | ◇ UNVERIFIED |
